Trolley



(No Model.) 7 4 I V D. LIPPY, I. E. PINFROGK, G. A. RINEHART &

- D R. FRANCIS.

H TROLLEY. 4 No. 564.795. Patented July 28, 1896.

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UNITED STATES PATENT OFFICE.

DAVID IIIPPY, IRA ELMER FINFROCK, GEORGE ATTIGG RINEHART, AND DAVID RAITT FRANCIS, OF MANSFIELD, OHIO.

TROLLEY.

SPECIFICATION forming part of Letters Patent No. 564,795, dated July 28, 1896.

Application filed Se te b i- 24, 1895. Serial No. 563,539. (No model.)

To all whom it may concern.-

Be it known that we, DAVID LIPrY, IRA EL' MER FmFRooK, GEORGE ATTIGG RINEHART, and DAVID RAITT FRANCIS, citizens of the United States, residing at Mansfield, in the county of Richland and State of Ohio, have invented certain new and useful Improvementsin Trolleys; and we do hereby declare that the following is a full, clear, and exact description of the same, reference being had to the annexed drawings, making a part of this specification, and to the letters of reference marked thereon.

The present invention relates to overhead trolleys for electric railways, and has for its object the provision of a more efficient and satisfactory base or support for holding the trolley-wheel against the conductor-wire than has heretofore been devised, and to this end said invention consists in the trolley base or support having the construction and combination of parts substantially as hereinafter specified.

In the annexed drawings, Figure 1 is a perspective view of our invention. Fig. 2 is a longitudinal Vertical section, and Fig. 3 a de tail perspective view.

Referring to the drawings, A designates a bearing-plate which is secured to the top of the car in any usual manner and pivotally supports a base piece or block B, the pivoting means being a pintle b and socket 0.

Within the block B is a round, horizontal opening C, at each end of which is a plate D, fastened by screws to the block. Passing through said opening and projecting beyond each plate is a shaft E, that upon one of such projecting portions has fixed to it, so as to turn with it, a crank-arm F, and upon the other projecting portion has a freely-turning crank-arm G. Encircling the shaft within the opening is a coiled spring H, one end of which is attached to a collar I, pinned to the shaft, and the other end of which, passing through a segment-shaped opening (1 in one of the plates D, is attached to the loose crankarm G. The crank-arms F and Gr project in opposite directions, and both are adapted to be moved by the single spring, one through the direct action of the spring upon it and the other through the shaft and collar. The

spring is held from turning when either arm is moved in the direction opposite. that in which the spring tends to move it, and is thus placed under further tension by the unmoved arm engaging a rib or stop J, projecting from the end of the block below the arm.

One end of the shaft is flattened at L for engagement by a suitable tool whereby, by revolving the shaft, the tension of the spring may be adjusted. When such adjusting is to be done, the fast arm F is loosened from the shaft by the loosening of the set-screw M.

Each arm F and G is connected by a chain N with one of two oppositely-extending arms 0 and O of a masthead P, pivoted to a lug on the top of the block B, so that when free to act the spring will hold the mast in a vertical position, the spring through one arm operating to swing the mast up from one side, and through the other arm to swing it up from the other side. The lowering of the mast on either side causes the winding of the spring, but as the chain that moves the arm to do this moves toward the mast-pivot as the mast approaches a horizontal position the increase in tension of the spring is accompanied by a diminished effective pressure on the mast, and the nearer the mast reaches a horizontal position the less will be the power exerted thereon by the spring.

est when the mast is in a vertical position there is always ample pressure applied to the wheel to keep the same in contact with high wires, and as the power is lessened when the mast is at a point intermediate the vertical and the horizontal danger of cutting the wheel from excessive pressure on the wire is avoided. The power of the spring being slight when the mast is in a horizontal position, manipulation of the mast to shift its position is rendered easy, as is also the holding of the same to the roof of the car, when it is neces sary.

Our device is extremely simple and compact, and while we prefer the construction shown it may of course be deviated from in detail with out departure from our invention. WVhat we claim is- 1. The combination of the pivoted mast, a shaft having two arms that are respectively,

The advantage of this is that as the power of the spring is greatrigidly and loosely mounted thereon, a spring and connections between the spring and arms, and connections between the arms and mast, substantially as and for the purpose specified.

2. The combination of the pivoted mast having oppositely-extending arms, the shaft having two arms that are respectively, rigidly and loosely mounted thereon,the coiled spring around said shaft, having one end connected thereto and the other end connected to the loosely-mounted arm, and connections between said arms and the mast-arms, substantially as specified.

3. The combination of the block having the horizontal opening, the shaft extending through and projecting beyond the ends of the opening, an arm rigidly attached to one of the projecting portions of the shaft, an arm loosely mounted upon the other projecting portion of the shaft, a coiled spring encircling 20 the shaft within the block-opening, and at" one end attached to the shaft, and at the other to the loose arm, the masthead pivoted to the top of the block, and a chain connectin g each arm with the masthead, substantially 25 v 

